The Democrat-aligned super PAC's spot, backed by a nearly $650,000 buy and running for two weeks, features three state residents criticizing former Michigan Secretary of State Terri Lynn Land on issues including tax breaks for the wealthy and women's health, while labeling Land a "career politician." www.youtube.com/watch?v=pHDzf7q6V_g

As the party fights to keep control of the Senate, Democrats are counting on Rep. Gary Peters to hold the seat being vacated by Sen. Carl Levin. Peters has held small leads in the public polls released over the last few months, but Land has proven an able fundraiser.

Peters announced Wednesday raising nearly $2 million in the second quarter, a personal best. A few hours later, Land touted bringing in more than $2.1 million and contributing an additional $1.2 million out of pocket.

Both candidates have been hit by outside spending, including nearly $5 million in independent expenditures, according to the Federal Election Commission. Before its current buy, Senate Majority PAC had already invested about $2 million against Land.

The race is rated Leans Democrat by Rothenberg Political Report/Roll Call.